Compare Samyang 21mm F1.4 ED AS UMC CS vs Samyang 20mm F1.8 ED AS UMC vs Laowa 9mm f/5.6
Construction
Aperture Blades
9 blades, Circular blades
7 blades
5 blades
Colors
Black
Form Factor
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
APS-C
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Physical aperture ring, DoF scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Sony E-mount
Canon EF-mount, Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
Leica M-mount, Leica L-mount, Nikon Z-mount, Sony E-mount
Optical Formula | Elements
8 elements
13 elements
14 elements
Optical Formula | Groups
7 groups
12 groups
10 groups
Optical Formula | Special Glass
3 aspherical and 2 ED elements + Ultra Multi Coating groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
58 mm / 2.28 in
77 mm / 3.03 in
Size | Diameter
64 mm / 2.52 in
83 mm / 3.27 in
62 mm / 2.44 in
Size | Length
68 mm / 2.68 in
88 mm / 3.46 in
66 mm / 2.60 in
Weight
275 g / 9.72 oz
497 g / 17.56 oz
350 g / 12.37 oz
Function
Angle Of View
69.0° Diagonal | 59.5° Horizontal | 41.7° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
134.9° Diagonal | 126.9° Horizontal | 106.3° Vertical
Aperture
f/1.4 ~ f/22
f/1.8 ~ f/22
f/5.6
Autofocus
No
No
No
Crop Factor
1.5
Focal Length
21 mm
20 mm
9 mm
Focal Length (35mm Equivalent)
31.5 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.21x
Min Focus Distance
280 mm / 11.02 in
200 mm / 7.87 in
120 mm / 4.72 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2015-09-21
2016-08-08
2020-06-30
Made In
China
Reviews
Neofiliac score
50%
59%
40%
Pros
- Bright maximum aperture
- Very sharp
- Good color rendition
- Rather affordable
- Widest full-frame rectilinear lens
- Dramatic angle of view
Cons
- Lacks weather sealing
- Lacks weather sealing
- Not the highest grade of build
- Dark maximum aperture
- Lacks front filter thread
Remove
Remove
Remove
Add up to 4 products to the comparison using the search bar above
Information on this page is provided on an as-is basis. No warranty on accuracy is implied. This page may contain affiliate links to third-party merchants such as Amazon and eBay. If you make a purchase using the supplied link, we may receive a commission. Neofiliac places the utmost respect for your privacy. We use no cookie whatsoever beyond that needed for the proper functioning of the website.